[mythtv-users] VGA to component cables

Cory Papenfuss papenfuss at me.vt.edu
Fri Jan 5 14:02:32 UTC 2007

> [1] <http://www.lenexpo-electronics.com/2M-6FT-ATLONA-HIGH-QUALITY-
> I think other posters have also conjectured that such a cheap cable
> surely has no electronics in it to convert from RGB to YPbPr, and is
> surely:
> 1) Mis-labelled on the website.
> 2) Actually outputting RGB.
 	This is the actual case:
   No electronics, simply breakout cable for the Red/Green/Blue output 
D/A's and video amps on the video card to connect to RCA connectors.  The 
video card and *driver* for the card then simply outputs color-transformed 
data (Y, Pb, Pr) out the R, G, B channels... plus adds a "sync-on-Y"

 	The card and driver must support this functionality.  I do not 
know if anything other than ATI does or whether or not linux drivers 
support it.



* Cory Papenfuss, Ph.D., PPSEL-IA                                       *
* Electrical Engineering                                                *
* Virginia Polytechnic Institute and State University                   *

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